From patchwork Fri Oct 16 16:04:39 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 11842033 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2622961C for ; Fri, 16 Oct 2020 16:05:14 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A53C0216C4 for ; Fri, 16 Oct 2020 16:05:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="K7eCJ07R" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A53C0216C4 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 6F33394000D; Fri, 16 Oct 2020 12:04:54 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 67FE4940011; Fri, 16 Oct 2020 12:04:54 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 47F5894000D; Fri, 16 Oct 2020 12:04:54 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0249.hostedemail.com [216.40.44.249]) by kanga.kvack.org (Postfix) with ESMTP id 94550940011 for ; Fri, 16 Oct 2020 12:04:53 -0400 (EDT) Received: from smtpin10.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 945093632 for ; Fri, 16 Oct 2020 16:04:52 +0000 (UTC) X-FDA: 77378262024.10.play04_3f1086a2721e Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin10.hostedemail.com (Postfix) with ESMTP id 6F34816A0B9 for ; Fri, 16 Oct 2020 16:04:52 +0000 (UTC) X-Spam-Summary: 1,0,0,38085a3aa937573f,d41d8cd98f00b204,willy@infradead.org,,RULES_HIT:41:355:379:541:800:960:973:988:989:1260:1311:1314:1345:1359:1437:1515:1534:1539:1568:1711:1714:1730:1747:1777:1792:2393:2559:2562:3138:3139:3140:3141:3142:3865:3867:5007:6120:6261:6653:7901:10004:11026:11473:11658:11914:12297:12555:12679:12895:13069:13161:13229:13311:13357:13894:14181:14384:14394:14721:21080:21451:21627:21990:30054,0,RBL:90.155.50.34:@infradead.org:.lbl8.mailshell.net-62.8.15.100 64.201.201.201;04y8ra55wakffs5t6ak7iftypbepeocykfpb3y877tc4rt85y91txu3r9hzyxr3.ybx3h55boguddpfrp7om8opa5txtr7o5iiw9kt4sjbcpetkamb6ss3umpaxx89k.o-lbl8.mailshell.net-223.238.255.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fn,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:25,LUA_SUMMARY:none X-HE-Tag: play04_3f1086a2721e X-Filterd-Recvd-Size: 2309 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf32.hostedemail.com (Postfix) with ESMTP for ; Fri, 16 Oct 2020 16:04:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=GW1YniPzUpda1PIsi2+AeQMOnKxd544xKFcJ+bcv5fM=; b=K7eCJ07RGw8arkwgdNQlSnFq2d h58I6X6KM/kN3gsXkDv8ux5v0KW2AdOMDbxEYqWMRa2akXqD1y7uxOqSSE3mbOQiQP5XubA1bTI9d 5QhNLeLpvS5ZSpLhxDD6q7m+bunICgdybQ5RkJLfRivaOkc7VsVkKt579lLY/VLYfLufn1SXfuODI MpDLjJQF6BqojsFDzeUzHOKrttAlZTfqm4uY5ds92AkkILMEcF0HDAE95ByBWgPnyVSek8g10QYfu BRkDeEIxHLIOFAT/tp5BZU/4KHfxkHkOOn9rCVq0R8OwtkBguJR8VN07wr++Djct1xBbqq68FQVQZ Ru/VSt/A==; Received: from willy by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kTSDo-0004tr-WB; Fri, 16 Oct 2020 16:04:49 +0000 From: "Matthew Wilcox (Oracle)" To: linux-fsdevel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-mm@kvack.org, Richard Weinberger Subject: [PATCH v3 14/18] hostfs: Tell the VFS that readpage was synchronous Date: Fri, 16 Oct 2020 17:04:39 +0100 Message-Id: <20201016160443.18685-15-willy@infradead.org> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20201016160443.18685-1-willy@infradead.org> References: <20201016160443.18685-1-willy@infradead.org> MIME-Version: 1.0 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: The hostfs readpage implementation was already synchronous, so use AOP_UPDATED_PAGE to avoid cycling the page lock. Signed-off-by: Matthew Wilcox (Oracle) Acked-by: Richard Weinberger --- fs/hostfs/hostfs_kern.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c index c070c0d8e3e9..c49221c09c4b 100644 --- a/fs/hostfs/hostfs_kern.c +++ b/fs/hostfs/hostfs_kern.c @@ -455,6 +455,8 @@ static int hostfs_readpage(struct file *file, struct page *page) out: flush_dcache_page(page); kunmap(page); + if (!ret) + return AOP_UPDATED_PAGE; unlock_page(page); return ret; }